Qt webftpclient example is broken - how to fix?

Hi, I like to build some program similar to the webftpclient example (in Qt 4). But the displayed html list is broken because FtpReply::readData in the example code is only called once even if there is more content. Does someone know how to fix the use of QNetworkReply in this example? https://qt.gitorious.org/qt/qt/source/663b742ca8b289e6456facf8b6a8ca18a4157fb7:examples/webkit/webftpclient